Kernel 2.4 doesn't support
So this process does asynchronous IO, what does the 2.4-kernel use to handle that? Something which is not visible as a running process per se, perhaps?
Asynchronous i/o overlaps application processing with i/o operations
for improved utilization of CPU and devices, and improved application
performance, in a dynamic/adaptive manner, especially under high loads
involving large numbers of i/o operations.
1.1 Where aio could be used:
Application performance and scalable connection management:
(a) Communications aio:
Web Servers, Proxy servers, LDAP servers, X-server
(b) Disk/File aio:
Databases, I/O intensive applications
Streaming content servers (video/audio/web/ftp)
(transfering/serving data/files directly between disk and network)